Large-scale grouting supplementing method between segments and surrounding rocks for TBM tunnel construction

Abstract

The invention relates to a large-scale grouting supplementing method between segments and surrounding rocks in TBM method tunnel construction. The method fills the blank of solving the problem of large-scale refilling grouting of a long tunnel section ubiquitously existing in small-section and long-distance TBM reverse slope tunneling tunnel construction, by utilizing the elevation difference andreverse-slope conditions of a tunnel main branch tunnel, a grouting construction method for carrying out slurry conveying and centralized pressurization by using the existing water supply pipeline intunnel construction is provided, multiple working faces can be carried out simultaneously after TBM tunneling is stopped or completed for some reasons, frequent moving, mounting, moving and operationmaintenance of mechanical equipment are avoided, a large amount of manpower and material resources are saved, the grouting supplementing method is simple in process, short in construction period, highin efficiency and convenient in quality control, and the defects in the prior art is overcome.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a large-scale supplementary grouting method between segments and surrounding rocks in TBM tunnel construction. Background technique [0002] 1. In the lining construction of TBM excavation segment, the gap between the segment and the surrounding rock is filled with pea gravel and backfilled with grouting, so that the cemented pea gravel, segment and surrounding rock jointly bear the internal and external loads. At the same time, the pea gravel layer is cemented to form a closed anti-seepage circle, which improves the anti-seepage performance of the tunnel. Full-section backfill grouting needs to be completed on the post-supporting trolley (if possible, the post-supporting design is an upper and lower two-layer structure, and the segment grouting hole should be exposed as much as possible). [0003] Therefore, in the design of the post-supporting functions of the TBM,...

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Problems solved by technology

[0004] 2. For TBM construction with small sections (the net diameter in the tunnel behind the lining segment is less than 5m), due to the limited supporting space, the slag discharge belt, secondary air duct and dust removal duct have occupied the space of the tunnel arch, resulting in The grouting hole in the 90° range on the top is covered, and it is impossible to backfill and grout the entire section on the supporting trolley, resulting in de-grouting

[0009] Through public literature search, no relevant comparative documents were found

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